Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc3d22d8b8b0886…

MALICIOUS

PDF

41.7 KB Created: 2020-08-21 08:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e70287bbb30a931a5ff72e305301aaa9 SHA-1: 02e50d24497b2c7ff8ab1da6e6865bab03970bb7 SHA-256: ccc3d22d8b8b0886a284d265fbe98a945d25d9e93c42d77cb45c892d72cfd23d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly indicates maliciousness. The document body text, though partially corrupted, contains the URL 'https://ttraff.ru/pify?keyword=bourne+supremacy+subtitles', suggesting a lure to download further content or redirect to a malicious site. The presence of numerous other links, many pointing to Shopify, indicates a link farm strategy, likely for SEO poisoning or distributing malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=bourne+supremacy+subtitles
    • http://vokibul.alpacamade.com/uploads/1/3/1/3/131380213/563070.pdf
    • https://cdn.shopify.com/s/files/1/0431/5899/5095/files/beatles_something_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0437/6684/1505/files/bal_brahmachari_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/9663/7597/files/perfect_english_speaking_course_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/51030202678.pdf
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/1999_mercedes_ml320.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/human_brain_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/wevojomusoxikepeloko.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/bafetuku.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ae4.bin
174f08320076a8437212fd802b9823357fbfd2efafae97ba680c050244ca4af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE4 5368 bytes
font_01_sfnt_off00005d13.bin
3f96a42a126c66e30ebb139cee213458d6c9a097cc0a8e28d297dd482a546424
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 10276 bytes
font_02_sfnt_off0000807b.bin
25e65a53bb6185df25f1658e95de7b9aaecf7d874996b3c81441914a8277c46b
pdf-font-stream PDF embedded font (sfnt) at offset 0x807B 17460 bytes